Shear-punch.



v Patented'Feb. ll, I902.

T. F. PHILIPPI. 7

SHEAR PUNCH.

(Application filed June 7, 1901.\

(No Model.)

UNITED STATES- PATENT OFFICE.

THEODORE F. PHILIPPI, OF ST. LOUIS, MISSOURI.

SHEAR-PUNCH.

SPECIFICATION forming part of Letters Patent No. 693,310, dated. February 11, 1902.

Application filed June 7, 1901. Serial No. 63,603. (No model.)

To all whom it may concern; 1

Be it known that I, THEODORE F. PHILIPPI, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Shear- Punches, of which the following is a full,

In the drawings, Figure 1 is a perspective of my machine. Fig. 2 is a front elevation .and part section showing the rock-shaft and parts carried thereby. Fig. 3 is a detail of one of the plungers and shear-head carried thereby, the rock-shaft being shown in section. Fig. 4 is a cross-section on line 4 4 of Fig. 2. Fig. 5 is an edge view of one of the plungers. Fig. 6 is a plan of a sheet of metal having an opening cut therein, and Fig. 7 is a perspective diagrammatic view showing a modified method of mounting the cuttingblades.

The present invention is specially adapted forfurnace and range builders,being designed to cut openings in rangeplates without the necessity of either turning the blades or the plate to be out, the object of the invention being to mount the blades in such a relation as to minimize the labor of cutting and reduce the time necessary to perform the required work.

A further object of the invention is to construct a punch which shall be simple, readily adjustable, effective, and one possessing further and other advantages better apparent from a detailed description of the invention, which is as follows:

Referring to the drawings, 1 represents a bed-plate, from which projects the curved arm 2, by which the movable operating parts are supported. Projecting upward from the end of the arm 2 are loops or bearings 3 for the support of a rock-shaft 4, one end of which is provided with a weighted handle-bar or lever 5, the opposite end being provided with a counterweight in the shape of a quadrant 6. Loosely passed over one end of the shaft 4 and inserted into one of the loops 3 is a rotatable sleeve 7, likewise provided with an operating-handle 5', properly counterweight'ed' by a quadrant 6. Keyed or otherwise seen red to the shaft 4, between the bearings 3 3, and

located adjacent to the inner end of the sleeve 7 is an eccentric or bushing 8, a similar bushing 8 of equal diameter being secured to the adjacent end of the sleeve. Loosely embracing the eccentric 8 is the upper looped end of a plunger 9, a similar plunger 9! being sus 11 having secured thereto the reciprocating blade 12 and the head 11" having secured thereto the blade 12. A operates with a stationary blade 13 13, respectively fixed to a Wall 1414, projecting from the bed-plate.

As seen from the drawings, the cutting edges of the blades 12 12 incline downward from the line of intersection made by the planes in which the blades are disposed-that is to say, the meeting-point of the cutting edges is higher than the opposite ends of the blades. While this is the preferred arrangement, it is Within the spirit of my invention to have the cutting edges incline upward, as seen in the modification in Fig. 7, though the latter is not the desirable construction, as it makes it difficult to feed the original plate, when once an incision is made therein, past the wall carrying the stationary blade of the adjacent pair of blades.

When a plate or sheet S, as shown in Fig. 6, is to be out, the throat formed between the arm 2 and bed-plate 1 is of sufficient depth to admit sheets of prevailing dimensions. Once such a sheet is inserted between the blades 12 13 an incision of any desirable length may be cut by simply feeding the plate in a line parallel to the faces of the blades, when the adjacent blades 12 13 may be brought into requistion and an incision made at right angles (or Whatever may be the angle which the Each blade 12 12 coblades make with one another) to the first cut, thereby cutting a square or oblong opening (or even an elliptical one by a skilful manipulation of the plate) without removing the plate from the machine or even turning the same or without the necessity of turning the cutting-blades, as is necessary with the old forms of shear-punches where only a single pair of blades is used.

It is to be remembered that the present device is specially applicable for cutting holes in the body of a plate away from the edges thereof, the only manipulation to which it is necessary to subject the plate being first a feed in a line parallel to the plane of the faces of one pair of blades and a subsequent feed in a line parallel to the plane of the faces of the adjacent or contiguous pair of blades, each pair being capable of independent operation, as is obvious from the mechanism described.

It is apparent that I may depart in a measure from the details herein set forth without affecting the spirit or nature of the invention.

Having described my invention, what I claim is- 1.. In a shear-punch, a pair of juxtaposed movable blades having their cutting edges disposed in planes making an angle with one another and intersecting in a common line or vertex, the cutting edges of the blades making an angle with such line of intersection, a stationary blade for each movable blade, and mechanism for imparting an independent reciprocating motion to the movable blades, substantially as set forth.

2. In a shear-punch, a pair of juxtaposed blades placed at right angles to each other, and means for independently reciprocating said blades, substantially as set forth.

3. In a shear-punch, a pair of juxtaposed movable blades placed at right angles to one another; a stationary blade for each movable blade, and mechanism forimparting an independent reciprocating motion to the movable blades, substantially as set forth.

4. A shear-punch comprising a suitable bed-plate, an arm projecting over the same, a rock-shaft carried by the free end of the arm, a sleeve passed over the said shaft, an eccentric secured to the rock-shaft at a point adjacent to the end of the sleeve, a similar eccentric secured to the sleeve, plungers depending loosely from the eccentrics, shearheads to which the plungers are pivotally secured, blades at the lower ends of the shearheads, the blades being secured at an angle to one another, the cutting edges of the blades inclining downward from the line of intersection of the planes in which the blades are dis posed, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

PH ILlIlI. 

